.cnki-abstract-tooltip {
  position: fixed;
  max-width: 400px;
  padding: 10px;
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  z-index: 9999;
  display: none;
  font-size: 14px;
  line-height: 1.5;
  color: #333;
}

.pdf-download-btn {
  margin-left: 10px;
  padding: 2px 5px;
  font-size: 12px;
  cursor: pointer;
}

.download-all-btn {
  margin-left: 10px;
  padding: 5px 10px;
  font-size: 14px;
  cursor: pointer;
  background-color: #007BFF;
  color: white;
  border: none;
  border-radius: 4px;
}

.download-all-btn:hover {
  background-color: #0056b3;
}

.keyword-tag {
  display: inline-block;
  padding: 1px 6px;
  margin: 0 4px 4px 0;
  font-size: 9px;
  border-radius: 10px;
  white-space: nowrap;
}
